2. Editing the Document Source

The most commonly used commands/macros of AUCTeX are those which
simply insert templates for often used TeX, LaTeX, or ConTeXt
constructs, like font changes, handling of environments, etc. These
features are very simple, and easy to learn, and help you avoid mistakes
like mismatched braces, or ‘\begin{}’-‘\end{}’ pairs.

Apart from that this chapter contains a description of some features for
entering more specialized sorts of text, for formatting the source by
indenting and filling and for navigating through the document.